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					Originally Posted by Aussie Mike  ...This is the flange design I'm using now. Much easier undo and swap around. These are Dave's pipes. They use a 2.5" stainless perforated baffle tube.
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 I purchased 2 sets of perforated pipes 2.5" and 3" but it didnt seem to leave much room inside the 4"OD sidepipe so I went with just the 2.5" inner.  If/when I redo them I think that design will be the go.  Be prepared for questions.
LoBelly